configure

#!/usr/bin/perl

$target = 'build/repl';
@libraries = ( '' );

$compiler='clang++';
$ext='cpp';

sub list_local_includes($)
{
	$file = $_[0];
	@includes = ();

	open FILE, $file;
	@lines = <FILE>;
	foreach (@lines)
 	{
		if (/^\s*#include\s*"(.*)"\s$/)
		{
			push(@includes, $1);
		}
	}
	return @includes;
}	


`flex -o scanner.cpp scanner.l`;

opendir(LOCALDIR, ".");

@files = grep(/\.$ext$/, readdir(LOCALDIR));

closedir(LOCALDIR);


@rules=();
foreach (@files)
{
	$file = $_;
	s/\.$ext$//;
	s/^\s*//;
	$obj = "build/$_.o";
	@includes = list_local_includes($file);
	
	$rule = "\n$obj: $file @includes\n";
	$rule.= "\t$compiler -c $file -o $obj \${CFLAGS}\n\n";
	
	push @objs, $obj;
	push @rules, $rule;
}


open MAKEFILE, ">", ".makefile";

$result = <<EOF

CFLAGS=-g -DDEBUG_COMPILER
LIBS=-lfl 

OBJS=@objs

$target: \${OBJS}
\t$compiler -o $target @objs \${LIBS}
\t\@rm -f scanner.cpp
@rules

clean:
\trm -f build/*.o $target scanner.cpp a.out

EOF
;
print MAKEFILE $result;